Directions

In a large bowl combine cake mix, eggs, water and oil until moistened. Using a handheld mixer beat on medium speed for 2 minutes. Fold in semisweet chocolate chips. Place a heaping tablespoon of cake batter into each muffin cup. Place one Reeses mini peanut butter cup into each muffin cup, and top with an additional tablespoon of cake batter to cover - muffin cups should be about 2/3 full.

Bake in preheated oven 18-22 minutes or until toothpick inserted along the edge of the cupcake comes out clean. Set aside to cool completely.

To prepare frosting: place butter and peanut butter in a medium bowl and beat with a handheld mixer until fluffy and thoroughly combined. Add vanilla extract and beat until combined. Gradually mix in powdered sugar until well incorporated- if mixture becomes too thick, add milk a tablespoon at a time as needed until desired consistency. Beat for 3 minutes until light and fluffy. Frost cupcakes and if desired, garnish with mini semisweet chocolate chips.